Concavoconcave
[医] 对凹的, 双凹的
🗣️ 情景例句
It's no secret my wife is expecting a baby.
我老婆快生孩子了，这又不是什么秘密。
Christmas comes but once a year.
佳节良辰，机会难得。
Born a free man, he was now in chains.
他生来本是个自由人，如今却戴上了镣铐。